Digitized multichannel pulse amplitude analyzer structure and system thereof

Abstract

A digital multichannel pulse amplitude analyzer structure comprises a universal tube socket, a preamplifier PCB (printed circuit board), a power supply processing PCB, a signal processing and communication PCB and a signal acquisition and pretreatment PCB which are arranged in a shell, the universal tube socket is connected with the preamplifier PCB through a universal pin; the pre-amplifier PCB, the power supply processing PCB, the signal processing and communication PCB and the signal acquisition and pre-processing PCB are connected through a board-to-board connector in a laminated board structure. According to the invention, a unique laminated plate structure is adopted, so that a digital multi-channel system forms an integrated structure. The front end is a universal tube socket connected with a detector photomultiplier tube base, and the rear end is a communication interface connected with an upper computer and a low-voltage system power supply interface; connection cables among all parts in an original scheme are omitted, signal transmission is more stable, detection precision is higher, and the sensor has the advantages of being small in size, light in weight, low in power consumption, high in flexibility and the like.

Description

Technical Field

[0001] The invention relates to an analyzer structure and a system thereof, in particular to a digital multi-channel pulse amplitude analyzer structure and a system thereof. Background Art

[0002] At present, the design ideas of digital multi-channel pulse amplitude analyzer can be used Figure 1 ,2 Schematic diagram of the digital multi-channel pulse amplitude analyzer system composition. The digital multi-channel pulse amplitude analyzer system shown is divided into a detector part, a system power supply part, a preamplifier part, a digital multi-channel pulse amplitude analyzer part, and a host computer part. However, the existing digital multi-channel pulse amplitude analyzer solution has defects such as large system volume, high noise, low precision, and poor flexibility because each part is designed separately and connected by signal cables to form a system.

[0003] In the prior art, the detector part is usually a darkroom structure in which a scintillation crystal and a photomultiplier tube are packaged as one, and the tube base is led out from the rear end of the photomultiplier tube as an electrical interface. Figure 3 shown.

[0004] In the prior art, the preamplifier part is usually a tube base structure, which has a tube base structure adapted to the photomultiplier tube base. The tube base structure leads out the electrical interface on the photomultiplier tube base and connects it to the signal amplification circuit board, and at the same time connects the high voltage to the photomultiplier tube through the circuit board. The structure of the preamplifier part is as follows: Figure 2 .3 Preamplifier structure diagram Figure 4 As shown; digital multi-channel pulse amplitude analyzer section, see Figure 5 shown.

[0005] In addition, the prior art, such as the publication number: CN110780337A, is an integrated energy spectrum measurement system suitable for neutron activation analysis, which includes a detector, a tube holder multi-channel pulse amplitude analyzer, an interface and a housing. The detector includes a scintillator and a photomultiplier tube, and the gamma rays entering the detector are finally converted into electrical pulse signals; the tube holder multi-channel pulse amplitude analyzer is encapsulated by a metal housing, including a voltage divider circuit, an adjustable high-voltage power supply circuit and a multi-channel energy spectrum acquisition circuit, the voltage divider and the adjustable high-voltage power supply provide bias voltages for each dynode of the photomultiplier tube, and the multi-channel energy spectrum acquisition circuit realizes the conversion of ray pulse signals to energy spectra; the interface circuit adopts a PoE interface, which can realize the functions of powering the system and realizing network port communication; the housing plays the role of bearing, electromagnetic shielding and ray shielding, and all components and circuits are encapsulated in this detector housing.

[0006] However, the various functional modules of the prior art cannot be replaced, the compatible detector models are limited, the communication mode cannot be selected, and the use is inconvenient. Utility Model Content

[0007] In order to solve the defects in the prior art, the present invention discloses a digital multi-channel pulse amplitude analyzer structure, and its technical solution is as follows:

[0008] A digital multi-channel pulse amplitude analyzer structure comprises a universal tube holder, a preamplifier PCB board, a power processing PCB board, a signal processing and communication PCB board, and a signal acquisition and pre-processing PCB board arranged in a shell; the universal tube holder is connected to the preamplifier PCB board through a pin; the preamplifier PCB board, the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board are connected in a stacked structure through a board-to-board connector.

[0009] Preferably, the housing is an aluminum alloy housing.

[0010] Preferably, a high voltage module is installed on the back side of the power processing PCB board.

[0011] Preferably, the power processing PCB board is connected to a power interface connector arranged on the housing. Preferably, the signal processing and communication PCB board is connected via a communication interface connector installed on the housing.

[0012] Preferably, the power interface connector and the communication interface connector are arranged at the same end of the housing. Preferably, the housing is a cylindrical structure.

[0013] Preferably, the preamplifier PCB board is connected to the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board through a first board-to-board connector; the power processing PCB board is connected to the signal processing and communication PCB board through a second board-to-board connector; the signal processing and communication PCB board is connected to the signal acquisition and pre-processing PCB board through a third board-to-board connector.

[0014] The utility model also discloses a digital multi-channel pulse amplitude analyzer system, comprising a detector, an analyzer composed of the above-mentioned digital multi-channel pulse amplitude analyzer structure, and a host computer; its characteristics are: the detector transmits the detected signal to the preamplifier PCB board of the analyzer through the communication interface on the universal tube socket; the signal processing and communication PCB board processes the detector signal output by the signal acquisition and pre-processing PCB, and sends it to the host computer through the communication interface connector.

[0015] Beneficial Effects

[0016] 1. Integration: The integrated design saves signal line connections between modules, shortens the signal transmission distance from several centimeters to several meters to less than 10 centimeters, and all signal lines are internal lines between boards. For anti-interference performance.

[0017] 2. The front end of the digital multi-channel pulse amplitude analyzer is a universal tube socket, and the back end is a communication interface. This digital multi-channel pulse amplitude analyzer can be directly connected to the photomultiplier tube base of the scintillator detector to start measuring. It has a smaller size, less transmission signal loss, high accuracy, and is very convenient to use.

[0018] 3. The PCBs of various functional parts are connected by board-to-board connectors, which can easily replace various functional modules and facilitate maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a block diagram of the digital multi-channel pulse amplitude analysis system of the prior art;

[0020] Figure 2 It is the structural block diagram of the existing digital multi-channel pulse amplitude analysis system;

[0021] Figure 3 It is a schematic diagram of the detector structure in the prior art;

[0022] Figure 4 It is a schematic diagram of the structure of a preamplifier in the prior art;

[0023] Figure 5 It is a structural schematic diagram of a digital multi-channel pulse amplitude analysis system in the prior art;

[0024] Figure 6 This is a structural schematic diagram of a digital multi-channel pulse amplitude analyzer of the present invention;

[0025] Figure 7 This is a structural schematic diagram of a digital multi-channel pulse amplitude analysis system of the present invention;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the digital multi-channel pulse amplitude analyzer of the present invention;

[0027] Fig. 9 It is a three-dimensional schematic diagram of the universal tube socket of the present invention;

[0028] Fig.10 This is a layout diagram of a first board-to-board connector of the present invention;

[0029] Fig.11 Schematic diagram of a second board-to-board connector. DETAILED DESCRIPTION

[0030] See also Figure 6A digital multi-channel pulse amplitude analyzer structure includes a tube holder, a preamplifier PCB board, a power processing PCB board, a signal processing and communication PCB board, and a signal acquisition and pre-processing PCB board arranged in a housing; the tube holder is connected to the preamplifier PCB board through a pin; the preamplifier PCB board is connected to the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board through a first board-to-board connector; the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board are connected to each other through a second board-to-board connector and a third board-to-board connector in a stacked structure; the power processing PCB board is connected to a power interface connector; and the signal processing and communication PCB board is connected to a communication interface connector. Figure 8 This is a schematic diagram of the structure of a three-dimensional digital multi-channel pulse amplitude analyzer.

[0031] in:

[0032] a): The shell is an aluminum alloy shell; the shell is preferably a cylindrical structure; its main function is to fix the internal components and protect the internal components from damage such as bumps and electromagnetics. The shell structure can be set in different styles according to the specific communication method, but other structures do not need to be changed. Only one structural part needs to be changed to match the communication circuit to achieve the selection of multiple communication methods.

[0033] b) Universal tube holder: Its front end has an interface that connects with the scintillator detector tube base, and the rear end has pins leading out of the interface, see Fig. 9 shown.

[0034] c) Preamplifier PCB: In the prior art, the preamplifier part is usually a tube seat structure, which has a tube seat structure adapted to the base of the photomultiplier tube. The tube seat structure leads the electrical interface on the base of the photomultiplier tube and connects it to the signal amplification circuit board, and at the same time connects the high voltage to the photomultiplier tube through the circuit board. The structure of the preamplifier part is as follows: Figure 3The schematic diagram of the preamplifier structure is shown. The preamplifier PCB used in the present invention has pads corresponding to the interface pins at the rear end of the universal tube base, and is connected to the universal tube base by welding; in addition, there are two board-to-board connectors on it for connecting the power processing PCB and the signal acquisition and pre-processing PCB. Its specific functions are: to divide the high voltage electricity input by the power processing PCB, and output it to the universal tube base, and then input it into the scintillator detector; to preliminarily amplify the signal output by the scintillator detector, and output it to the signal acquisition and pre-processing PCB. The detector part commonly uses a darkroom structure in which the scintillation crystal and the photomultiplier tube are packaged as one, and the tube base is led out at the rear end of the photomultiplier tube as an electrical interface. The power output by the power processing board provides the required high voltage for the photomultiplier tube, and provides low voltage power for the preamplifier and the digital multi-channel pulse amplitude analyzer, see Fig.10 shown.

[0035] d) Power processing PCB: converts external power into internal system power, mainly generating high voltage output to the preamplifier PCB, and then supplying the scintillator detector; the generated low voltage power is transmitted to the signal processing and communication PCB and the signal acquisition and pre-processing PCB through the second board-to-board connector. The power interface connector is installed on the housing and connected to the power processing PCB; the power interface connector and the communication interface connector are arranged at the same end of the housing; in addition, it also includes a high-voltage module, which is arranged on the back of the power processing PCB. The board-to-board connector uses a 0.8mm pitch BTB connector to realize the electrical connection function of parallel PCB boards. See Fig.11 shown.

[0036] e) Signal processing and communication PCB: processes the detector signal output by the signal acquisition and pre-processing PCB, and sends it to the host computer through the communication interface connector; the communication interface connector is installed on the housing and connected to the signal processing and communication PCB board.

[0037] f) Signal acquisition and pre-processing PCB: The detector signal (analog signal) output by the preamplifier PCB is converted into a digital signal through a high-speed ADC and output to the signal processing and communication PCB.

[0038] See also Figure 7 The digital multi-channel pulse amplitude analyzer system comprises a detector, an analyzer formed by the structure of the digital multi-channel pulse amplitude analyzer, and a host computer; the characteristics are as follows: the detector transmits the detected signal to the preamplifier PCB board of the analyzer through the communication interface on the universal tube socket; the signal processing and communication PCB board processes the detector signal output by the signal acquisition and pre-processing PCB, and sends it to the host computer through the communication interface connector.

[0039] The present invention highly integrates the various parts of the digital multi-channel pulse amplitude analyzer system and adopts a unique stacked plate structure to form an integrated structure for the digital multi-channel system. The front end is a universal tube socket connected to the base of the detector photomultiplier tube, and the rear end is a communication interface connected to the host computer and a low-voltage system power interface (using computer USB communication, the 5V provided by the USB can be used to power the device, and an additional power interface can be omitted). The connecting cables between the various parts of the original solution are omitted, making the signal transmission more stable and the detection accuracy higher. It has the advantages of small size, light weight, low power consumption, and high flexibility.

[0040] Compared with the prior art, the structure of a digital multi-channel pulse amplitude analyzer disclosed in the present invention only changes the layout of the functional modules, and does not change the performance and function of the digital multi-channel pulse amplitude analyzer. The working principle of the analyzer can refer to the prior art.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A digital multi-channel pulse amplitude analyzer structure, comprising a universal tube holder, a preamplifier PCB board, a power processing PCB board, a signal processing and communication PCB board, and a signal acquisition and pre-processing PCB board arranged in a housing; its characteristics are: The universal tube socket is connected to the preamplifier PCB board through pins; the preamplifier PCB board, the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board are connected in a stacked structure through a board-to-board connector.

2. The digital multi-channel pulse amplitude analyzer structure according to claim 1 is characterized by: The shell is an aluminum alloy shell.

3. The digital multi-channel pulse amplitude analyzer structure according to claim 1 is characterized by: A high voltage module is installed on the back of the power processing PCB board.

4. The digital multi-channel pulse amplitude analyzer structure according to claim 1 is characterized by: The power processing PCB board is connected to a power interface connector arranged on the housing.

5. The digital multi-channel pulse amplitude analyzer structure according to claim 4 is characterized by: The signal processing and communication PCB boards are connected via a communication interface connector mounted on the housing.

6. The digital multi-channel pulse amplitude analyzer structure according to claim 5 is characterized by: The power interface connector and the communication interface connector are arranged at the same end of the housing.

7. The digital multi-channel pulse amplitude analyzer structure according to claim 1 is characterized by: The shell is a cylindrical structure.

8. The digital multi-channel pulse amplitude analyzer structure according to claim 5 is characterized by: The preamplifier PCB board is connected to the power processing PCB board, the signal processing and communication PCB board, and the signal acquisition and pre-processing PCB board through a first board-to-board connector; the power processing PCB board is connected to the signal processing and communication PCB board through a second board-to-board connector; the signal processing and communication PCB board is connected to the signal acquisition and pre-processing PCB board through a third board-to-board connector.

9. A digital multi-channel pulse amplitude analyzer system, comprising a detector, an analyzer having a digital multi-channel pulse amplitude analyzer structure as described in any one of claims 1 to 8, and a host computer; wherein: The detector transmits the detected signal to the preamplifier PCB board of the analyzer through the communication interface on the universal tube socket; the signal processing and communication PCB board processes the detector signal output by the signal acquisition and pre-processing PCB, and sends it to the host computer through the communication interface connector.

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